Last update
5/4/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.2
Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Niacin
500 mg
3,125%
Most Useful Reviews
6
Heart rate normalised
2 people found this helpful
My mother has been taking niacin for her heart issues. Initially, she experienced pain and pressure, but after using the supplement, her nerves have calmed, and her heart rate is no longer a bother.
Read More
7.5
Heart health maintained
21st Century Niacin Prolonged Release consists of 100 tablets, each with a 500 mg dose of niacin (vitamin B3). Niacin may aid in promoting heart health and supporting normal metabolism. The sustained release ensures an extended effect over time, and it is advisable to consult a doctor before consuming large doses of niacin.
Read More
User Reviews
USERS' SCORE
Good
Based on 2 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
6
Heart rate normalised
2 people found this helpful
My mother has been taking niacin for her heart issues. Initially, she experienced pain and pressure, but after using the supplement, her nerves have calmed, and her heart rate is no longer a bother.
Read More
7.5
Heart health maintained
21st Century Niacin Prolonged Release consists of 100 tablets, each with a 500 mg dose of niacin (vitamin B3). Niacin may aid in promoting heart health and supporting normal metabolism. The sustained release ensures an extended effect over time, and it is advisable to consult a doctor before consuming large doses of niacin.
Read More
Frequently Asked Questions
6
Heart rate normalised
2 people found this helpful
My mother has been taking niacin for her heart issues. Initially, she experienced pain and pressure, but after using the supplement, her nerves have calmed, and her heart rate is no longer a bother.
7.5
Heart health maintained
21st Century Niacin Prolonged Release consists of 100 tablets, each with a 500 mg dose of niacin (vitamin B3). Niacin may aid in promoting heart health and supporting normal metabolism. The sustained release ensures an extended effect over time, and it is advisable to consult a doctor before consuming large doses of niacin.
